Resume playback from DSD waves

#!/bin/bash

# Credit to https://stackoverflow.com/questions/9639103/is-there-a-goto-statement-in-bash/31269848#31269848 for this goto style feature

jumpto ()
{
    label=$1
    cmd=$(sed -n "/$label:/{:a;n;p;ba};" $0 | grep -v ':$')
    eval "$cmd"
    exit
}

start=${1:-"start"}

jumpto $start

##InotifyWait on our sound file and log modifications. DSD does not close the file when running and writes out, it appends.

start:
while inotifywait -q -e modify snet.wav; do

# Use ffprobe instead of soxi, more reliable. This is to check if the file is new or contains audio already. If new, play from start, if not, the variable to end of script will be resume point.

  SOXI=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 snet.wav)
  sleep 1 # Buffer at least one second of audio
  DAY=$(date +"%d-%m-%Y %T")
   if [ "$SOXI" = "N/A" ]; then
     echo "From start..."
     NEWLENGTH=0
   else
     echo "Resuming from " $SOXI
   fi
  break
done

# Use MPV to play the file, or resume from last place

mpv --start=$NEWLENGTH snet.wav

# After playing the file, check it's duration for resuming later

NEWLENGTH=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 snet.wav)

echo $DAY $NEWLENGTH

# Goto 10
jumpto start